Functions:1. Pump is designed in two stage of high and low speed for quick oil output. Even if lack of electric power, It could still be operated conviniently. It is the same as the electric pump in any working pressure and fucntion.2. Manual operation style, oil pipe fitted with quick coupling could be odered in any length. It could be fitted with pressure meter.3. Pressure could be stopped in middle. Inner designed over pressure safety unit protect hydraulic valve.4. Oil pipe coupling with PT3/8 thread.